Bessemer converter



(No Model.)

H. SGHULZE-BERGE.

BESSEMER CONVERTER.

No. 307,874. Patented Nov. 11 1884.

N PETERS. Pmwuxho n her. wasmn mn n C being provided with a blast-main, b, blast- NITED STATES OLIVER, JR, AND JAMES P. VVITHEROXV,

CITY, PENNSYLVANIA.

BOTH OF ALLEGHENY BESSEMER CONVERTER.

SPECIFICATION forming part of Letters Patent No. 307,874, dated November 11, 1884.

' Application filed January 14, 1834. (No model.l

To all whom it may concern;

Be it known that I, HERMANN SoHULzn- BERGE, of Rochester, in the county of Beaver and State of Pennsylvania, have invented a new and useful Improvement in Bessemer 0onverters and Similar Vessels; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to that class of Bessemer converters known as fixed or Swedish, in which the blast is controlled and regulated by means of stoppers applied to the tuyeres, and particularly to those using internal stoppers. \Vhere a coniform stopper is used in a horizontal tuyere, the tendency of a mild or low pressure blast is to cause the air to enter at the upper side of the stopper, particularly if there is a considerable quantity of metal in the converter above the lines of the tuyere, in which case the metal has a feud ency to enter the tuyere behind the stopper at the lower side, and to prevent the stopper from closing tightly on its seat. To overcome this difficulty, and at the same time to protect the stopper from the action of the molten metal, I have devised my present improvement, which I will now describe by reference to the accompanying drawings, in which Figure l is a vertical section of a converter, and Fig. 2 is a longitudinal section of one of 1 the tuyeres and stoppers.

Like letters of reference indicate like parts in each.

The converter to is of'the usual construction,

pipes 0, charginghole d, tapping-hole c, cinder-notch f, and throat all of the usual construction. The tuyeres h are each provided with an external air chamber or pipe, t, to which the blast-pipe c is connected, and with a stopper, 7c, in this instance cone-shaped. The stopper 7; is operated by means of a stem, 7t, and lever If, and closes against a suitable seat, k.

Extending down over the end of each tuyere from the under side of the vessel is a hood or wall, Z, constructed of fire-resisting material, the lower edge of which is grooved, as at Z,

and extends below the lower plane of the tuyere. It forms an air chamber or trap, in closing a sufficient quantity of air when the stopper is closed to prevent the molten metal in the converter from rising up into contact with the stopper. It causes all the air which comes through the tuyere to be carried down below the metal, and to discharge upward in one direction. Itprodnces a more thorough and intimate action of the blast in the converter, and obviates all the objections hereinbefore stated to internal stoppers. The grooves Z direct the air into streams or jets as it passes out of the hood.

I do not limit my invention to the precise form or construction of shield or hood 1 shown and described, as it is apparent that it may be varied in form and construction, and still have the functions of protecting the stopper and giving a downward direction to the blast. Nor do I limit myself to that form of vessels or furnaces for treating molten metal commonly known as fixed converters, but include also other forms which, being fixed, have pneumatic tuyeres extending laterally through the sides below the metal line.

hat I claim as my invention, and desire to secure by Letters Patent, is-

1. A fixed converter or similar vessel for treating molten metal having tuyeres extending laterally through its sides, provided with downwardly-proiecting close hoods or shields over the mouths of thc tuyeres, substantially as and for the purposes described.

2. In a fixed converter or similar vessel for treating molten metals, tuyeres extending laterally through the sides of the converter, and provided with internal stoppers, in combination with downwardlyprojecting shields 0r hoods extending over the mouths of the same, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 22d day of December, A. D. 1883.

HERMANN SOHULZE-BERGE.

Witnesses:

THOMAS E. KERR, W. B. CORWIN. 

